Browser Gamma Correction Test Page

sRGB-labelled PNGs on HTML Colors

This page was created in order to test the self-consistency of web browsers'
gamma correction. In brief, if they gamma-correct HTML colors on non-sRGB
systems (which would be proper, according to the HTML 4.01 specification),
then they should also gamma-correct unlabelled images in the same way.
Alternatively, if they don't gamma-correct HTML colors (which also is allowed
in HTML 4.01, unlike
in CSS), then they should not gamma-correct unlabelled images, either.
In the latter case, however, labelled images (such as PNGs with a gAMA,
cHRM, sRGB or iCCP chunk, including the ones on this page) are unlikely to
match the HTML colors across all platforms.

This version of the page uses PNG images labelled as being in the
sRGB color space, with no redundant gamma info for non-sRGB-aware decoders.
The sRGB rendering intent is ``absolute colorimetric.''
The images will be distinct from the cell backgrounds on a non-sRGB system
(such as most Macs, SGIs and NeXT cubes) if the browser gamma-corrects
only one of the two. On an sRGB system, such as most Windows- and
Unix-based PCs, the edges of the images will be invisible regardless
of any gamma correction (unless, of course, the implementation of gamma
correction is broken).